Vol. 4, No. 9, 2009

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Buckling of stiffened composite panels with stringer terminations

Enzo Cosentino and Paul Weaver

Vol. 4 (2009), No. 9, 1505–1533

A meshless approach is developed and used to predict buckling of discretely assembled multibay composite panels made from skin and stiffeners. The effect of eccentricity is included in the formulation. Particular emphasis is given to stringer run-outs within a stiffened panel, where abrupt eccentricity can trigger very large transverse displacements of the skin in front of the run-out tip. The model is obtained by combining von Karman’s formulation for moderately large deflections in plates with an extended Timoshenko approach for small initial perturbations. Solutions are calculated by means of a Rayleigh–Ritz approach in conjunction with a Galerkin technique. Hilbert’s orthogonal eigenfunctions are employed to obtain a generalized Fourier series expansion of the variables of interest. Limits of applicability, convergence of results and further potential exploitations are discussed. Numerical results obtained are compared with finite element analysis.

stringer terminations, buckling, composite panels
Received: 18 November 2008
Revised: 4 March 2009
Accepted: 26 August 2009
Published: 17 January 2010
Enzo Cosentino
Composite Stress Analysis, Composite Structures Development Centre
Airbus UK Ltd.
Bristol  BS34 7AR
United Kingdom
Paul Weaver
Advanced Composite Centre for Innovation and Science
Department of Aerospace Engineering
University of Bristol
Queen’s Building 2.39
University Walk
Bristol  BS8 1TR
United Kingdom